1320149 has 2 divisors, whose sum is σ = 1320150. Its totient is φ = 1320148.

The previous prime is 1320127. The next prime is 1320157. The reversal of 1320149 is 9410231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1249924 + 70225 = 1118^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320149 - 2⁸ = 1319893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660074 + 660075.

It is an arithmetic number, because the mean of its divisors is an integer number (660075).

2^1320149 is an apocalyptic number.

It is an amenable number.

1320149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320149 is an equidigital number, since it uses as much as digits as its factorization.

1320149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1320149 is about 1148.9773714047. The cubic root of 1320149 is about 109.7002583488.

The spelling of 1320149 in words is "one million, three hundred twenty thousand, one hundred forty-nine".